A randomized 25 question test from a pool of 761 questions, good luck!
Which of the answers below best represents the first bit sent in a RS-232 asynchronous frame?
Each network layer for a DCS has it's own specialized equipment or software. Which of the layers below would make use of firewall in its connection to the control network?
In IPv4, it is possible to divide the class of network into a smaller network. Which of the terms below best describes this process?
Communication technology is generally specific to a type of area network. Which of the area networks below would IDSN and VPN be used primarily?
Ethernet network components provide several ISO layers of transmission control. Which of the network components below has transmission controls on the ISO network layer and possibly the data link layers?
In a DCS, there is a controller scan cycle priority that should have enough time to execute all tasks. Which of the answers below represents the about of free time for a loaded DCS controller to function?
The OSI model describes how a network should be arranged. Which of the layers below concern network topologies the most?
Which error check method is best described as an industry standard fieldbus protocol?
Ethernet/IP is based on a protocol that the higher OSI layers of DeviceNet uses. Which of the answers below is the correct acronym for this protocol?
There are numerous styles of fiber optic cables. Which of the answers below best represents the number of criteria that is used to match the proper cable to the desired application?
SCADA systems are specialized utilizations of a process control systems. Which of the terms below can be best defined as manipulation and communication of a process though a control system?
There has to be a way for data to be communicated to the systems I/O for a HMI application to be effective. Which of the terms below best represents the pool of information for this communication?
In IPv4, there are a range of protocols that can be used at any one time. Which of the protocols below would be best suited for sensitive data transmission?
There are numerous I/O modules that a typical DCS has access to. Which of the modules below is described as one that the scanner module receives information communicated digitally from up to 63 supported devices?
Digital signals are, either specific or transitory, voltage levels represent states of logic. Which of the signal encoding methods below uses the conversion of dc voltage levels to ac to represent logic states?
In the protocol specifications of Modbus, there are only four types of registers that can be accessed by the master. Which of the answers below expresses the register size and permissions of an input status register?
There are numerous I/O modules that a typical DCS has access to. Which of the modules below is described as one that converts a digital signal to 8 or 16 outputs?
Which of the messaging methods is best described as one that can only be initiated by the link master in the H1 transmission system?
Which of the network components below would commonly be used as a protocol converter and communication signal converter?
There are several data access methods used to transmit data. Which of the answers below can be described as a method that allows sequential communication on a network with multiple devices?
DCS commonly is considered a computerised control system for a plant that has central operator supervisory control. Which of the terms below is best described as controllers and operator stations that are separated physically from the central control system?
Which answer below is best described as the RS-232 standard for voltage range to receive a "Space"?
A typical DCS has at least four layers in it's architecture. Valves, switches and transmitters are all under the direct control of which of the layers below?
The standard recommended by ISA-18.2 is for 3-4 priority level alarms to be used. Which of the alarm priority levels below can best be described as the movement of process conditions from normal to upset, requiring operator action at some point in the future?
There are many versions of Modbus, one of those is Modbus ASCII. Which of the answers below correctly orders the components of the Modbus ASCII frame?